Xpra: Ticket #1243: add unique window identifier

To allow restoring layout of windows after client reconnect it's necessary to uniquely identify each window. One such way would be to extend formatting of --title to add @windowid@ to show id of the window on the server. It would also be useful to add such formatting capabilities to window class and instance strings (WM_CLASS) on which windowmanagers often classify the windows.

Sat, 02 Jul 2016 10:43:41 GMT - Antoine Martin: owner changed

I think we can easily add support for:

These could be supported too:

But since they are already forwarded, I don't understand why the window manager does not distinguish the windows already using these properties.

I would not want to start modifying the wm-class, I think that will create more problems than it solves.

Sat, 02 Jul 2016 10:55:01 GMT - Antoine Martin:

After looking at the code, I realized that all the attributes are already available for substitution, the only one that needed to be added was "windowid". r12946 does that.

Please close if this works for you.

Thu, 20 Jul 2017 17:01:46 GMT - Antoine Martin: status, milestone changed; resolution set

Not heard back, closing.

Sat, 23 Jan 2021 05:18:56 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1243